Controlled electric motor arrangement for a tension mechanism
Abstract
FIELD-ORIENTED CONTROL METHODS FOR AN ELECTRIC DRIVE AND OPERATION FOR A DRIVE TO TRACE AN OBJECT, ELECTRIC MOTOR ARRANGEMENT, AND, POSITION AND / OR SPEED CONTROLLER FOR ELECTRICALLY-DRIVEN CONTROL. The invention relates to a field-oriented method for controlling an electric drive comprising a plurality of electric motors, for example, to implement a traction mechanism, especially for load and / or gear cable means. In the control method, measurements are taken from a real multi-phase motor current. The measured values are transformed into a direct current component and a quadrature current component, based on a magnetic rotor field angle or flow angle, in a rotor based d, q coordinate system. The measured quadrature current component is compared with a predetermined transverse current component of a current command value, to obtain a command value for motor current control. The invention also relates to an electric motor arrangement, which is especially suitable for implementing the control method, with at least two electric motors that can be operated as multi-phase motors. The invention also relates to a position and / or speed controller for the field-oriented control of an electric drive, which is especially suitable for use in the above mentioned control method or in the above mentioned electric motor arrangement. The invention also relates to a starting method for a traction drive and, therefore, an arrangement for preparing electric motors.

Term
Projected expiry 26 September 2028.
- Priority
- Filed
- Granted
- Today
- Projected expiry
29 claims: 17 independent, 12 dependent
- 1REIVINDICAÇÕES 1. Método de controle orientado por campo para um acionamento elétrico compreendendo uma pluralidade de motores elétricos, para implementar um mecanismo de tração, especialmente para meios de cabo de carga e/ou de engrenagem (1,3), usando medições de uma corrente real de motor polifásico (U, V, W), cujos valores medidos são transformados em um componente de corrente contínua e um componente de corrente de quadratura, com base em um campo de rotor magnético ou ângulo de fluxo, em um sistema de coordenadas d, q, baseado em um fluxo de rotor, e os componentes de corrente de quadratura e de corrente contínua da corrente real são submetidos a uma comparação com predeterminados componentes de corrente de quadratura e de corrente direta (isq_ref, isd_ref) de um valor de comando de corrente, caracterizado pelo fato de possuir as seguintes etapas:a) dois motores síncronos (Ml, M2) são usados como motores elétricos b) as rodas magnéticas ou rotores dos dois motores síncronos (Ml, M2) são girados ou orientados um para o outro e são então mecanicamente acoplados em uma tal maneira que entre seus acoplamentos de fluxo magnético (T m i, Ψπώ) ou outros fluxos magnéticos um deslocamento angular (V) é formado, c) os dois motores síncronos são, cada, supridos com ou atravessados por meio das mesmas correntes de fase, a partir de um conversor de potência compartilhado, d) para um torque de pré-tração, um valor de comando ou referência é predeterminado, e é superposto a um valor de controle de torque de motor (m_ref) fornecido por meio de um controlador (7), a partir do qual um componente de corrente de quadratura (isq_ref) para o valor de comando de corrente é derivado, e) um componente de corrente contínua (isd_ref) para o valor de comando de corrente é derivado a partir do predeterminado valor de controle de torque de tração (m_ref) com reversão de sinal.
- 2Método de controle de acordo com a reivindicação 1, caracterizado pelo fato de que em uma operação contínua, o valor de controle de torque de pré-tração (m_ref) e/ou deslocamento angular (V) são mantidos constantes.
- 3Método de controle de acordo com a reivindicação 1 ou 2, caracterizado pelo fato de que um componente de corrente é usado no primeiro motor síncrono (Ml) como componente de corrente de quadratura formando torque (i q i) ou como componente de corrente contínua formando fluxo (idi) e ao mesmo tempo é usado no segundo motor síncrono (M2) como componente de corrente contínua formando fluxo (id2) ou como componente de corrente de quadratura formando torque (i q2 ), respectivamente.
- 4Método de controle de acordo com qualquer uma das reivindicações precedentes, caracterizado pelo fato de que, em cada caso, com base na magnitude e fase, o componente de corrente de quadratura (i q j) no primeiro motor síncrono (Ml) corresponde ao componente de corrente contínua (i d2 ) no segundo motor síncrono (M2), e o componente de corrente contínua (i d i) no primeiro motor síncrono (Ml) corresponde ao componente de corrente de quadratura (i d2 ) no segundo motor síncrono (M2).
- 5Método de operação para um acionamento para tracionar um objeto que pode ser flexível ou submetido a jogo, em que pelo menos dois motores elétricos (Ml, M2), que podem ser operados como motores polifásicos, são colocados em engate com forças opostas sobre dito objeto, usando um dispositivo de controle e/ou regulagem (WR, G) que controla os motores elétricos, caracterizado pelo fato de que, para dar partida ou arranque quando o acionamento de tração está em um estado de marcha em vazio ou desligado sem corrente, primeiro somente um (Ml) dos dois motores elétricos é atuado para um movimento de tração, até um primeiro critério de parada pré-especificado ser detectado por meio do dispositivo de controle e/ou regulagem (WR, G).
- 6Método de operação de acordo com a reivindicação 5, caracterizado pelo fato de que, depois da detecção de dito primeiro critério de parada, o segundo motor elétrico (M2) é atuado para um movimento de tração, até um segundo critério de parada pré-especificado ser detectado por meio do dispositivo de controle e/ou regulagem (WR, G).
- 7Método de operação de acordo com a reivindicação 5 ou 6, caracterizado pelo fato de que, durante a atuação do primeiro ou segundo motor elétrico (Ml, M2), o respectivo outro motor elétrico é curto-circuitado e/ou de outra maneira desacoplado do dispositivo de controle e/ou regulagem (WR, G).
- 8Método de operação de acordo com a reivindicação 5, 6 ou 7, caracterizado pelo fato de que, para desacoplar um ou ambos dos motores elétricos (Ml, M2) do dispositivo de controle e/ou regulagem (WR, G), em um dos motores elétricos (Ml) os enrolamentos de fase (Wl) nas duas respectivas extremidades são curto-circuitados preferivelmente em uma conexão em estrela ou delta, e no outro motor elétrico (M2) os respectivos enrolamentos de fase são ligados em ponte e/ou conectados conjuntamente em ambas de suas extremidades.
- 9Método de operação de acordo com qualquer uma das reivindicações precedentes, caracterizado pelo fato de que, durante a atuação de um dos motores elétricos (Ml, M2), o respectivo outro motor é usado como um freio eletrodinâmico por meio de um curto-circuito (S1, S2) de seus enrolamentos de fase.
- 10Método de operação de acordo com qualquer uma das reivindicações precedentes, caracterizado pelo fato de que um aumento no fluxo de corrente de motor e/ou alcance de uma predeterminada posição de motor e/ou um predeterminado período de sincronização serve como um critério de parada.
- 11Arranjo de motor elétrico, especialmente para um mecanismo de tração, compreendendo para meios de cabo de carga e/ou de engrenagem (1, 3), com pelo menos dois motores elétricos, cada dos quais pode ser operado como um motor polifásico, especialmente para implementar o método de controle como definido em qualquer uma das reivindicações precedentes, caracterizado pelo fato de compreender as seguintes características marcantes:a) os dois motores elétricos são incorporados como motores síncronos (Ml, M2), b) os motores síncronos são conectados um com o outro em série através de seus enrolamentos de fase (Wui, u2 Wvi,v2 Wwi, W2í U1,U2;V1,V2;W1,W2), c) os motores síncronos (Ml, M2) são acoplados com um conversor de potência compartilhado (4) para ativá-los, d) os motores síncronos (Ml, M2) são mecanicamente acoplados um com o outro através de suas rodas magnéticas ou rotores em uma tal maneira que eles são deslocados um do outro em termos de sua posição angular, e/ou seus acoplamentos de fluxo magnético (\|/ m i, ψ Μ 2) ou outros alinhamentos magnéticos formam um ângulo de deslocamento (V) um com o outro.
- 12Arranjo de motor elétrico de acordo com a reivindicação 11, caracterizado pelo fato de que o deslocamento angular (V) das rodas magnéticas ou rotores e/ou seus alinhamentos magnéticos um em relação ao outro perfaz 90 graus, ou está situado entre 0 grau e 180 graus.
- 13Arranjo de motor elétrico de acordo com a reivindicação 11 ou 12, caracterizado pelo fato de que o acoplamento mecânico entre os rotores ou rodas magnéticas é implementado usando meios de cabo de carga ou de engrenagem (1,3).
- 14Arranjo de motor elétrico de acordo com a reivindicação 13, caracterizado pelo fato de que os meios de cabo de carga ou de engrenagem (1,3) compreendem uma linha de tração apertadamente puxada ou rodas de engrenagem que são engrenadas uma com a outra e são 5 tracionadas em seus flancos de dente adjacentes.
- 15Arranjo de motor elétrico de acordo com qualquer uma das reivindicações precedentes, caracterizado pelo fato de que um primeiro dos dois motores síncronos (Ml, M2) é conectado diretamente com o conversor de potência (4) através de seus enrolamentos de fase (Wui, W V i, W W i), e o 10 segundo motor síncrono (M2) é suprido com ou recebe corrente de conversor de potência (4) indiretamente através do primeiro motor síncrono (Ml).
- 16Arranjo de motor elétrico de acordo com qualquer uma das reivindicações precedentes, caracterizado pelo fato de que no motor síncrono que é arranjado na última posição com respeito ao conversor de potência em 15 uma série de motores síncronos, os enrolamentos de fase (Wu2, Wv2, Ww2) são conectados em umaxonexão em estrela ou delta, enquanto no outro motor ou motores síncronos (Mitl), que não são arranjados na última posição, os condutores e extremidades de seus enrolamentos de fase (Wui, Wvi, Wwi) são disponíveis para conexão externa com o conversor de potência (4) ou com um 20 motor síncrono adjacente (M2).
- 17Arranjo de motor elétrico de acordo com qualquer uma das reivindicações precedentes, caracterizado pelo fato de que, para implementar um circuito de controle de acionamento, um ou ambos os motores síncronos (Ml, M2) são providos com um dispositivo (2) para detecção de posição, cuja 25 saída é suprida para um dispositivo de controle (5) que controla o conversor de potência (4).
- 18Arranjo de motor elétrico de acordo com qualquer uma das reivindicações precedentes, caracterizado pelo fato de que um dispositivo de controle compartilhado (5), que compreende um controlador de posição e/ou velocidade (7), é alocado aos motores síncronos (Ml, M2), e é acoplado com o conversor de potência (4,WR) para seu controle.
- 19Arranjo de motor elétrico de acordo com qualquer uma das reivindicações precedentes, especialmente para um mecanismo de tração com para meios de cabo de carga e/ou de engrenagem, com pelo menos dois motores elétricos que podem ser operados como motores polifásicos, que são acoplados com um dispositivo de controle e/ou regulagem compartilhado (WR, G), especialmente para implementar o método de operação como definido em qualquer uma das reivindicações precedentes, caracterizado pelo fato de que os enrolamentos de fase de um ou ambos os motores elétricos (Ml, M2) são equipados com elementos de comutação (Sl, S2), que são arranjados para desacoplar um ou ambos os motores elétricos (Ml, M2) do dispositivo de controle e/ou regulagem (WR, G).
- 20Arranjo de motor elétrico de acordo com a reivindicação 19, caracterizado pelo fato de que os meios de comutação (Sl, S2) são incorporados inteiramente ou parcialmente como interruptores (S2) que ligam em ponte os enrolamentos de motor (W2) em suas extremidades, ou como interruptores (S2) que conectam diferentes fases (U2, V2, W2).
- 21Arranjo de motor elétrico de acordo com a reivindicação 19 ou reivindicação 20, caracterizado pelo fato de que os meios de comutação (Sl, S2) são configurados para serem operáveis através do dispositivo de controle e/ou regulagem (WR, G).
- 22Controlador de posição e/ou velocidade para o controle orientado por campo de um acionamento elétrico, especialmente um arranjo de motor elétrico como definido em qualquer uma das reivindicações precedentes, com pelo menos um dispositivo (7, 8) para calcular e fornecer um valor de comando de torque de motor (mit ref) (chamado “controlador de torque de motor” a seguir), a partir da saída ou saídas do qual, com base em um sistema de coordenadas d, q, baseado em fluxo de rotor, um componente Ί de valor de comando de corrente de quadratura (isq_ref) para um controlador de corrente de quadratura posicionado a jusante é derivado e fornecido, caracterizado pelo fato de compreender um dispositivo (14) para gerar um valor de controle de torque de pré-tração (chamado controlador de torque de 5 pré-tração” a seguir), cuja saída ou saídas dos quais são ligadas em um lado com a saída do controlador de torque de motor (7, 8) e no outro lado são supridas para um dispositivo (17) para derivar um componente de valor de comando de corrente contínua (isd_ref) (chamado controlador de valor de comando de corrente contínua” a seguir) para um controlador de corrente 10 contínua posicionado a jusante.
- 23Controlador de acordo com a reivindicação 22, caracterizado pelo fato de que as saídas do controlador de torque de motor (7, 8) e o controlador de torque de pré-tração (14) são aditivamente ligados um com o outro, especialmente através de um ponto de soma (15). 15
- 24Controlador de acordo com a reivindicação 22 ou 23, caracterizado pelo fato de que a saída de controlador de torque de pré-tração é conectado com o controlador de valor de comando de corrente contínua (IILV) para a finalidade de derivar o valor de comando de corrente contínua (isd_ref) através de um elemento de reversão de sinal (-1). 20 25. Controlador de acordo com uma das reivindicações 22-24, caracterizado pelo fato de que, em adição à saída de controlador de torque de pré-tração, a saída do controlador de torque de motor (7, 8) é acoplada com a entrada do controlador de valor de comando de corrente contínua (1/Ψ). 26. Controlador de acordo com uma das reivindicações 22-25,
- 2525 caracterizado pelo fato de que um ponto de soma (20) é arranjado na entrada do controlador de valor de comando de corrente contínua (17), através do qual o valor de saída do controlador de torque de pré-tração (14) é subtraído do valor de saída do controlador de torque de motor (7, 8), e o resultado da subtração é fornecido para a entrada do controlador de valor de comando de corrente contínua (17;12, 1/Ψ, 19).
- 2627. Controlador de acordo com uma das reivindicações 22-26, caracterizado pelo fato de que o controlador de torque de pré-tração (14) tem uma entrada preferivelmente operável extemamente para ajustar o torque de 5 pré-tração.
- 2728. Controlador de acordo com uma das reivindicações 22-27, caracterizado pelo fato de que a saída do controlador de torque de pré-tração (14) é suprida para um ponto de soma (20), com inversão de sinal (16), cuja segunda entrada é conectada com a saída do controlador de torque de motor 10 (7, 8), e as saídas de ponto de soma são conectadas com a entrada do controlador de valor de comando de corrente contínua (17;12, 1/Ψ, 19) para derivar o valor de comando de corrente contínua (isd_ref).
- 2829. Controlador de acordo com uma das reivindicações 22-28, caracterizado pelo fato de que cada das saídas de valor de comando de 15 corrente de quadratura e corrente contínua (isq_ref, isd_ref) é equipada com um elemento limitador (13, 19), que é configurado para restringir as saídas para faixas tendo sinais que são opostos uns aos outros.
- 2930. Controlador de acordo com uma das reivindicações 22-29, caracterizado pelo fato de que o controlador de torque de pré-tração (14) é 20 ajustado e/ou configurado para fornecer um valor de controle, que corresponde a 50 porcento ou aproximadamente 50 porcento do torque de motor máximo possível, para a respectiva entrada dos dispositivos (10, 19,1/ Ψ) para a finalidade de derivar um valor de comando de corrente de quadratura e/ou de corrente contínua (isq_ref, isd_ref). 1/7 Tensionamento sobre o motor 2 fí$1.2 2/7 Acionamento de Tração Controlador Fijj. 3 M 3/7 ο (0 h 8η 4/7 Inversor Fíp. 5 5/7 Estado de f marcha em vazio . \ Aceleração para } a esquerda com respeito à figura 1 Aceleração para c ) a direita com respeito à figura 1 Fig-6 6/7 7/7 ν- CM 3. ) S1 aberto, S2 fechado, portanto somente M2 é controlável e M1 está em operação de curto-circuito. 4. ) M2 (operação sem sensor) puxa, até que WI1 (com sensor) se mova um pouco. 5. ) KTY:Sensor de temperatura.
Independent claims29
107 paragraphs in 3 sections, as filed
(54) Title: FIELD-ORIENTED CONTROL METHOD FOR AN ELECTRIC DRIVE AND OPERATION FOR A DRIVE TO TRACT AN OBJECT, ELECTRIC MOTOR ARRANGEMENT, AND, POSITION AND / OR SPEED CONTROLLER FOR ELECTRICALLY DRIVEN FIELD CONTROL (30) Unionist Priority: 27/09/2007 EP 07117386.8, 27/09/2007 DE 10 2007 046 681.3, 27/09/2007 DE 10 2007 046 681.3 (73) Holder (s): Baumüller Nürnberg GMBH (72) Inventor (s): Jinshen Jiang, Viktor Barinberg
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(51) Int.CI .:
B62D 5/04 (2009.01) (57) Abstract: FIELD-ORIENTED CONTROL METHODS FOR ELECTRIC DRIVING AND OPERATION FOR DRIVING AN OBJECT, ELECTRIC MOTOR ARRANGEMENT, AND, POSITION AND / OR SPEED CONTROLLER FOR CONTROL ORIENTED BY FIELD OF AN ELECTRIC DRIVE. The invention relates to a field-oriented method for controlling an electric drive comprising a plurality of electric motors, for example, to implement a traction mechanism, especially for load and / or gear cable means. In the control method, measurements are taken from a real multi-phase motor current. The measured values are transformed into a direct current component and a quadrature current component, based on a magnetic rotor field angle or flow angle, in a rotor based d, q coordinate system. The measured quadrature current component is compared with a predetermined transverse current component of a current command value, to obtain a command value for motor current control. The invention also relates to an electric motor arrangement, which is especially suitable for implementing the control method, with at least two electric motors that can be operated as multi-phase motors. The invention also relates to a position and / or speed controller for the field-oriented control of an electric drive, which is especially suitable for use in the above mentioned control method or in the aforementioned electric motor arrangement. The invention also relates to a starting method for a traction drive and, therefore, an arrangement for preparing electric motors.
Positioning
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b2
Traction
M2)
<img file="BRPI0803535A2_D0003.tif" />
Position sensor or Position sensor on the engine 2
ΡΙ0803535-0 “FIELD ORIENTED CONTROL METHODS FOR AN ELECTRIC DRIVE AND OPERATION FOR A DRIVE TO TRACT AN OBJECT, ELECTRIC MOTOR ARRANGEMENT, AND, POSITION CONTROLLER AND / OR
SPEED FOR FIELD ORIENTED CONTROL OF ELECTRIC ACTIVATION ”
DESCRIPTION
The invention relates to a field-oriented method for controlling an electric drive comprising a plurality of electric motors, for example, to implement a traction mechanism, especially for load and / or gear cable means. In the control method, measurements are taken from a real multi-phase motor current. The measured values are transformed into a direct current component and a quadrature current component, based on a magnetic rotor field angle or flow angle, in a rotor based d, q coordinate system. The quadrature / measured current component is compared with a predetermined transverse current component of a current command value, to obtain a command value for motor current control.
The invention also relates to an electric motor arrangement, which is especially suitable for implementing the control method, with at least two electric motors that can be operated as multi-phase motors. The invention also relates to a position and / or speed controller for the field-oriented control of an electric drive, which is especially suitable for use in the above mentioned control method or in the above mentioned electric motor arrangement.
The invention also relates to a starting method for a traction drive and, therefore, an arrangement for preparing electric motors.
I
For a wire steering system, a steering actuator is proposed (DE 101 03 667 Al), in which two electric motors are provided. The pinions of electric motors act on a gear wheel, which drives, for example, a rack and pinion steering transmission or a steering column, to which a steering wheel is attached. When the actuator is required to generate only low levels of torque, then the two electric motors are controlled in such a way that they are displaced relative to each other, therefore no play occurs in the gear between pinion and gear wheel. This is ensured when the pinion tooth flanks and the gear wheel are positioned against each other with zero play. Zero gear drive of the gear wheel can be achieved through the appropriate control of the two electric motors, in which the rotation directions of the two electric motors are oriented towards each other. It is also proposed that each of the two electric motors can be provided with a rotor position sensor, as a provision for redundancy against a possible failure of one of the two electric motors.
In contrast to this, in the interest of efficient control of the multi-motor electric drive, the control method set out in claim 1 is proposed. An electric motor arrangement that is appropriate to implement the control method is set out in independent claim 11. A position and / or speed controller, which also falls under the general idea of the invention, is defined in independent claim 22. Advantageous optional exemplary embodiments of the invention are found in the dependent claims.
The invention comprises the basic idea of connecting two synchronous motors in series through their phase windings, thus allowing their two magnetic wheels and magnetic rotor flows to rotate with a phase or angular displacement in relation to each other.
The use according to the invention of two synchronous motors, which are characterized by effective controllability, a high level of efficiency and a high power factor, while at the same time having a low volume of construction, contributes to increased efficiency, resulting in advantages for servo applications, such as with traction mechanisms. In particular, synchronous machines are characterized by means of a rotating main field, which is fixed on the rotor, and the magnetic flux coupling is very often based on permanent magnets which are mounted on the surface of the rotor and result in a flow of approximately constant rotor, which facilitates controllability.
With the method of the invention, the magnetic wheels or rotors of the two synchronous motors are displaced in relation to each other with their magnetic flux couplings or other magnetic alignments at an angle, so that one and the same phase current can act in one motor as a current component forming a flow (continuous) and in the other motor as a current component forming a torque (quadrature). The phase or angular displacement is defined with respect to stationary or permanent coordinates, especially with respect to a stator-based coordinate system.
This paves the way for the next method characteristic according to the invention, more specifically that the two synchronous motors are supplied with the same phase current from a single shared power converter. Therefore, only a single power converter, especially a frequency converter or an inverter, is required, which provides substantial savings in terms of structural components.
In the context of the control according to the invention, a reference or command value for a pre-tension or traction torque is predetermined, which, on the one hand, is superimposed by the quadrature current component of the current command value. . On the other hand, this predetermined command value of traction torque, with an opposite sign, is used at the same time as a command value for the DC component. Because of the aforementioned angular displacement of the magnetic flux, this DC component acts on the second synchronous motor as a quadrature current component forming torque, while the quadrature current component that is applied to the first motor then originates the direct component forming flow in the second engine.
In this way, a coordinated and synchronized movement of the electric motors can be achieved, which is especially well suited to implement a traction mechanism for the purpose of eliminating play in gear or cable means. The coordination of the motion sequences is based on the coupling of the respective flow couplings of the synchronous motors through the angular displacement, in which one and the same phase current works as a quadrature current component in a motor, and as a component of direct current in the other motor.
To simplify the complexity in terms of control technique, it is desirable to maintain the angular displacement of the respective magnetic fluxes of the synchronous motor rotors and the command value for the pre-tension torque, constant during continuous operation. In this way, the respective phase current of the two synchronous motors can be easily and systematically adjusted to predetermined control values.
The synchronous motor arrangement that is within the scope of the general idea of the invention is characterized by its connection in series. This can be implemented in that the second synchronous motor is connected through the conductors of its phase windings with the ends of the phase windings of the first synchronous motor, which, in turn, is connected through the conductors of its phase windings with the power converter. This results in a coupling of the two synchronous motors with the power converter. With this series connection of the power converter, especially the inverter, the first synchronous motor and the second synchronous motor, the method characteristic of the invention is achieved in which the same phase current flows through both motors. In this case, only one of the two synchronous motors is connected directly to the power converter. Consequently, synchronous motors are coupled to each other serially through their phase windings, in such a way that each synchronous motor is supplied with the same phase currents by the power converter.
What is important is that the magnetic alignments of the magnetic wheels or rotors of the two synchronous motors are displaced not in phase, but in relation to each other at an angle of displacement. In principle, this angle can measure between 0 and ± 180 °, thus, for example, ± 45 °. In practical use, angular displacements of 90 ° have proved to be optimal. To implement phase shift or angular displacement between the magnetic flux couplings or magnetic alignments of the two synchronous motors, a mechanical coupling is used, according to the invention, which can be implemented, for example, using cable or gear means between rotors or magnetic wheels. This implementation is also efficient for the application of the traction mechanism according to the invention, because the mechanical coupling can then be produced using the load cable means or the gear wheel or other gear means. If the load cable means or the gear means are pulled, then the mechanical coupling between the rotors of the synchronous motors, and therefore also the angular displacement between their flow couplings or magnetic flow alignments, are established or defined .
The basic principle of the invention presents not only how to implement the double electric motor drive having only one inverter or power converter, but also the fact that only one of the two synchronous motors is equipped with a position detection device (system sensor and / or rotor model). This, consequently, results in the other embodiment of the invention, which reduces the number of components and is, therefore, cost-effective, as a controller that controls an inverter is allocated to both synchronous motors within the structure of a drive control circuit. The additional savings in terms of components and costs, combined with an increase in technical reliability, are obvious.
Another problem solved by means of the invention is the fact that the traction drive according to the main invention has not been defined in its initial state, with no current flow. The magnetic wheels of the two synchronous motors can be freely rotated against each other, without requiring the desired phase shift, preferably 90 ° between the two magnetic wheels. Another objective of the invention is, therefore, to achieve that, during starting, the desired phase shift is generated between the magnetic wheels of the two synchronous motors in the traction drive.
This objective is achieved by the method of operation indicated in claim 5. Advantageous optional embodiments are defined in the claims dependent on the method of operation. Suitable applications: starting method for traction of machine elements and assemblies that are subjected to play, such as gear mechanisms, mechanical transmissions and coupling elements, which, in the untractioned state, do not occupy a clearly defined position.
The method of operation of the invention is provided for a drive to pull an object that is flexible or that has play (play, tolerance) as at least two electric motors that can be operated as polyphasic motors are obstructing said object by means of opposite forces . A control and / or regulation device is used to control the electric motors. For starting or starting when the traction drive is in an idle state or off without power, first only one of the two electric motors is actuated for a traction movement until a first pre-specified stopping criterion is detected by means of control and / or regulation device. Then, optionally, the second electric motor is activated for a traction movement, until a second pre-specified stopping criterion is detected by means of the control and / or regulation device. The method of the invention for controlled starting of a drive system, consisting of a drive motor and traction motor, comprises the steps: when starting from the non-current mode, the traction torque is first generated in order to take the element to be pressed to a defined position; then allowing a transition to the intended operation.
According to an exemplary embodiment of the invention, during operation of the first or second electric motor, the respective other electric motor is short-circuited and / or otherwise decoupled from the control and / or regulation device. This is based on the fact that a short-circuit three-phase motor behaves like an electrodynamic brake. Consequently, during the actuation of one of the electric motors, the respective other motor is used as an electrodynamic brake by means of a short circuit (Sl, S2) of its phase windings. Advantageously, an increase in the motor current flow and / or the reach of a predetermined motor position and / or a predetermined synchronization period serves as a stopping criterion. Advantages of the multi-motor arrangements of the invention: individual control of two motors connected in series through a single converter; generation of an effective braking moment by simply shorting the motor windings.
In the context with the operating method of the invention, it is advantageous when the phase windings of one or both electric motors are equipped with switching elements, which are arranged to decouple one or both electric motors from the control and / or regulation device .
A control structure according to independent claim 13, which is functionally adapted to the invention, comprises a device for generating a command value or setpoint of pretraction or traction torque. On the one hand, its output is superimposed by a controller output for the motor torque, which is known in the art; on the other hand, the traction torque output of the controller - with signal reversal - is made available for further processing as a direct current component, expediently after being weighted with the reciprocal value of the motor flow coupling. Thus, it can be subjected to a command value / actual value comparison with a measured actual value for the DC component, and the difference is fed to a current controller, in a known manner. The respective control current d or q resulting from direct current and quadrature controllers results in one synchronous motor to form flow and the other synchronous motor to form torque.
Technical reliability and operational safety, especially for the application of traction mechanism, can be increased with an advantageous optional embodiment of the invention, in which the quadrature and direct current command value outputs are each equipped with a limiting element. Each such element is configured to restrict the command value output allocated to a range that has uniform signals. According to the invention, the signals from the two control value outputs are kept opposite each other by means of the limiting elements. The advantage achieved with this is that the mechanical coupling, and therefore a phase shift or angle of displacement between the magnetic flux couplings of the two synchronous motors is always ensured, so that one and the same phase current can be acts to form torque in one synchronous motor and to form flow in the other synchronous motor. In addition, in the application involving “traction of a flexible belt or some other soft line”, arching can be excluded with a high degree of reliability.
In order to be able to use the motor torque range for the maximum possible extraction, a form of embodiment of the speed controller of the invention is proposed, in which the output of the motor torque control and / or command value generator is supplied, preferably in the total, not only for the quadrature current command value component branch, but also for the DC component command value branch. Expressing this idea in concrete terms, a sum point is provided for this purpose, with the motor control torque and, with a negative sign, the pre-traction torque being supplied for its two inputs. From the difference, the direct current component is derived using a reciprocal weighting with a value for a flow coupling (which is determined based on the circumstances of the individual technical case). Because, with this particularly advantageous embodiment, the motor torque control value is processed and / or used to generate and supply not only the quadrature current component command value, but also the current component command value continuous, the available torque control range can be activated or controlled or used up to 100% in both directions.
According to another advantageous embodiment of the invention, a pre-tension torque is adjusted, which corresponds to approximately 50% of the maximum possible motor torque. With this, at least approximately 50% of the maximum possible motor torque can still be activated or controlled in both directions, even without the aforementioned insertion of the motor torque command value.
Further details, striking features, combinations of features, advantages and effects based on the invention can be found in the following description of preferred embodiments of the invention, and in the set of drawings. The drawings, each schematic representation, show:
Figure 1 a sketch outlining the engineering principle of an application device according to the invention involving the traction and positioning of a traction cable,
Figure 2 a sketch outlining the principle of device engineering, of an application according to the invention for pulling a gear train,
Figure 3 shows an electrical arrangement of the traction drive,
Figure 4 is a block diagram of a control structure, adapted in terms of the function of the invention,
Figure 5 is a block diagram of an additional control structure, adapted in terms of the function of the invention,
Figure 6a-6c vector flow and current diagrams for various applications.
7 shows an arrangement of an electric motor to perform the method of operation.
8 shows a device outline for the proposal according to the method of operation.
Figure 9 shows an alternative electric motor arrangement to perform the method of operation.
According to figure 1, the respective rotors (not shown) of two synchronous motors M1, M2 are mechanically coupled through a traction line 1, which is suitable for a variety of purposes. If the two synchronous motors Ml, M2 are controlled using opposite torques (see below), opposite accelerations bl, b2 are applied at the ends of the traction line 1 through the respective rotors of the synchronous motors Ml, M2. This results in traction of the traction line 1, for example, a traction cable or traction belt, so that arching between synchronous motors Ml, M2 is prevented. In addition, traction causes the respective rotors of the synchronous motors Ml, M2 to be kept in place at their angular position in relation to each other. According to the invention, this fixation in place is achieved by the fact that the respective magnetic flux couplings Ψμι, Ψμ2 (see figure 6) have a phase shift or an angular shift of preferably 90 ° relative to each other. To enable a controllable drive of the two synchronous motors, one or both are equipped with a position sensor 2, in which, in principle, it is sufficient, in principle, for only one of the two synchronous motors Ml, M2 to be scanned by means of of a position sensor 2.
According to figure 2, to drive a gear train, two synchronous motors M1, M2 are placed in positive engagement with a central gear wheel 3 through gear wheels that are coupled with their respective rotors. However, in most cases, this engagement of gear wheels is associated with undesirable play between the tooth flanks, which impairs the positioning accuracy. To restrict or prevent opposing gearwheels, opposing torques or accelerations bl, b2 are again applied to the two synchronous motors M1, M2. In this way, the opposite tooth flanks of the gear wheels that are engaged with each other rest directly against each other without play, in other words, they are pulled. The synchronous motor rotors are then definitely fixed in terms of their angular position, relative to each other. In addition, the statements made in reference to figure 1 can be applied here, correspondingly.
According to figure 3, the two synchronous motors M1, M2 are preferably supplied with the same nominal current level, connected in series, and from a shared power converter 4, for example, an inverter. For this purpose, the conductors of the motor phase windings Wui, W<sub>V</sub>i, Wwi of the first torque synchronous motor Ml are directly connected with the power converter phase terminals U, V, W. The ends of the motor phase windings of the synchronous motor Ml are directly connected with the conductors of the phase windings W motor<sub>u2</sub>, Wv2> of the second synchronous motor M2, according to the series connection. According to figure 3, the ends of the phase windings of the second synchronous motor M2 are connected in a star connection, however they can also be connected in a delta connection. The single power converter 4 is controlled via a control device 5, which is allocated to the two synchronous motors M1, M2 together.
According to figure 4, the control device 5 comprises, in a known manner, a speed command / actual value comparison point 6, a speed controller 7 positioned downstream of it, preferably configured as a PI controller , with a limiter 8 at its output, and a current controller 9. The outputs of the current controller 9 for the quadrature current and direct current components usq_ref, usd_ref are used to control a PWM pulse width modulator, positioned downstream of the latter, which is used in a known way to control the converter. power or inverter 4.
Between speed controller 7, which provides a command or reference value m_ref for a motor torque at its output, and current controller 9, a device 10 for deriving a command value of quadrature current component isq_ref, called quadrature current command value controller ”10 below, and downstream of this, a quadrature current command value / reall value comparator 1 are arranged. In the example embodiment shown in figure 4, the quadrature current command value controller 10 comprises a multiplication element 12 to weight the motor torque control value m_ref, of arrival with the reciprocal value of a coupling of magnetic flux ψ, and an added signal limiter 13 positioned downstream of that. This limits the quadrature current command value component isq_ref that arrives from multiplication element 12 to a positive range.
In addition, between speed controller 7 or motor torque controller 7, 8, consisting of the output of speed controller 7 and limiter 8, and current controller 9, a pre-tension torque controller 14 is arranged, whose output is provided, on the one hand, to a first summation point 15. Its second input is connected with the output of the motor torque controller 7, 8. On the other hand, the output of the pre-tension torque controller 14 is connected via a signal reversing element 16 to a direct current command value controller 17, through whose output a current command value component isd_ref is supplied for a direct current / actual value command value comparator 18. The direct current control value controller 17 also has a multiplication element 12 for reciprocal weighting of the control value for a pre-tension torque with the magnetic flux coupling Ψ and a negative output limiter 19. The latter limits the direct current command value isd ref coming from the multiplication element 12 for a negative signal range - in a function analogous to that of the above described positive limiter 13.
With the two positive and / or negative signal limiters, it is ensured, especially with regard to application as a traction mechanism, that each of the current components that form torque in the first synchronous motor Ml and in the second synchronous motor M2 have signals that are opposite each other, or the torques of the two Ml, M2 motors work opposite to each other to achieve traction. For this purpose, according to an example embodiment of figure 4, the traction torque controller 14 is arranged to provide a constant reference value for the pretension_torque traction torque. The constant traction reference value is conveniently approximately 50% of the maximum motor torque, so that a residual 50% motor torque control range can be used for actuation or control,
According to figure 5, to increase the available motor torque control range to approximately 100%, a second summation point 20 is arranged between the motor torque controller 7, 8 and the current controller 9, for a input of which the output of the traction torque controller 14 with a negative sign is supplied. The output of the motor torque controller 7, 8 or the motor torque control value m_ref is supplied to the other input, without signal reversal. The output of the second summation point 20 is supplied to the direct current control value controller 17 (see above). In this way, the motor torque command value, which is provided by speed controller 7, can be used until its total extraction for both quadrature current command value controller 10 and command value controller direct current 17. The reference value for pretension_torque is additively or subtractively superimposed on the first or the second summation point 15, 20. While, in the example embodiment according to figure 4, an adjustable torque range results for an acceleration of -50% to + 50%, in the form of an example embodiment according to figure 5, an adjustable torque range is reached for the acceleration from 100% to + 100%. With the example embodiment according to figure 5, the pre-tension torque controller 14 is conveniently configured to be extremly adjustable.
According to figure 6a-c, the magnetic flux coupling ΨΜ2 of the second synchronous motor M2 is electrically displaced by approximately 90 ° delay because of the mechanical couplings according to figures 1 and 2, in the previous direction of rotation, in relation to the magnetic flux coupling Ψμι of the first synchronous motor Ml. The stator current components, more precisely the quadrature current components i<sub>q]</sub> Hey<sub>q</sub>2, and the dc components i<sub>d</sub>iei ^ of the first or second synchronous motor Ml or M2, respectively, are represented in field coordinates for the operating conditions a - idle state - b - acceleration to the left with respect to figure 1 - and c - acceleration to the right with respect to figure 1. Assuming that the two synchronous motors Ml, M2 are magnetically approximately 100% symmetrical, the torque can be calculated as follows for the example embodiment of figure 4 (adjustable torque range: 500 / o) for the three operating conditions a, b, c: Operating condition a - idle status
An idle state is present when the torques of the two synchronous motors M1, M2 are at equal levels and are driven in opposition to each other, or have opposite signals. For this, the command value “torque 0” is issued via the current controller, according to figure 4. Therefore, in each case, only a control value of the same level for the pretension_torque traction torque is supplied both for the quadrature current command value controller 10 and the DC command value controller 17, the last with a reverse sign. The quadrature current components i<sub>qb</sub> i<sub>q2</sub> that result in the stators of synchronous motors Ml, M2 and are torque forming are equal in terms of magnitude, however they have inverse signals. As a result, opposite torques of the same magnitude result from the respective vector products Ψμιχ iqi (for the first synchronous motor Ml) and Ψ<sub>Μ2Χ</sub> iq2 (for the second synchronous motor M2), resulting in idle status.
Operational condition b - acceleration to the left with respect to figure 1
Based on a motor torque control value m<sub>re</sub>f, which is generated via speed controller 7 and output via motor torque controller 7, 8, a command value for increasing the quadrature current command value component is provided for the command value controller of quadrature current 10 according to figure 4, in which at the first summation point 15 a motor torque control value is added to the value for pretension_torque traction torque. The quadrature current command value component isq_ref, which is increased significantly in this way, is interpreted in the first synchronous motor Ml as an increased quadrature current i<sub>q</sub>i with a corresponding increase in torque (see the aforementioned cross product with ψ<sub>Μ</sub>ι), while this increased current component acts on the second synchronous motor M2 only as a flow forming component i<sub>d2</sub>. As a result, the first synchronous motor Ml applies a higher level of torque than the second to implement the movement to the left of the traction line 1, which can import a maximum of twice the torque of the second synchronous motor M2. Operating condition c - acceleration to the right according to figure 1
Based on the corresponding motor torque control value output m<sub>re</sub>f with a negative sign from the motor torque controller 7, 8, once when the traction torque command value having a positive sign was added, a relatively significant lowering of the quadrature current command value component results in the quadrature current command value controller 10, which is illustrated in figure 6c by means of a correspondingly reduced vector for the quadrature current component i<sub>q]</sub>. This current component acts on the second synchronous motor M2 as a direct current component forming flow id2, indicated after this by means of a dashed line is the current vector or phasor, which corresponds to the pretension_torque pre-set adjusted to a constant. This is reflected, with its supply to the direct current command value controller 17, in the constant quadrature current component forming torque i<sub>q</sub>2 of the second synchronous motor M2 (a corresponding current value is used in the first synchronous motor Ml only as forming a flow). In this case, the torque applied through the first synchronous motor Ml makes up only a fraction of the torque generated through the second synchronous motor M2, which is attributable only to the fixed output of the traction torque controller 14.
According to figure 7, among the first and second motors M1, M2, respectively, the windings W2 of the second motor M2, which is not equipped with an encoder or position sensor, are short-circuited. This is accomplished by activating the switch S2 located between the two motors Ml, M2. Its individual switching elements connect the end terminals of said W2 windings. Then, only the Ml motor with the G sensor remains connected to the inverter. A basic idea of the invention comprises short-circuiting one of the two motors during the starting phase, so that the other motor can be controlled and operated independently of the short-circuit motor.
Starting proposal: The second M2 motor is short-circuited and acts as a brake. The first Ml motor, coupled with the position sensor G and its phase windings W1 now connected in a star connection, is controlled like a normal servo motor, and is moved to a defined position, until an increased current flow through the motor can be identified (for example, through a current controller). If the current intensity increases substantially, this means that an intensified reverse torque is present as a load, for example, due to the short-circuit motor and when braking M2. It also means that the drive object, for example, the drive gear or cable 1, has been pulled. A partial arching L1, L2 of the traction cable 1, shown in figure 8 by means of a line of lines and points, has been eliminated.
Alternative starting proposal: First, the Ml motor with sensor, like a servo motor, is moved to a defined rotational position previously specified (first stopping criterion). Whether or not the traction object is pulled at this moment is irrelevant. In a second step, the second motor M2 is then released from its small circuit, and is moved until an increased current flow through the first motor M1 can be detected (second stopping criterion). This means that increased torques have to be overcome, and the traction object has been pulled.
According to figure 7, as for starting, the second motor M2 without a sensor is short-circuited. The first Ml motor is then moved until an increased current flow can be detected. This increased current flow occurs when the first Ml motor has to pull hard, for example, against the M2 motor, which is acting as a short circuit brake. Although the example embodiment shown in figure 1 illustrates the basic principle of the invention, a number of disadvantages still persist, for example, with respect to flexible pull cables 1, as shown in figure 8.
On the pull cable 1 shown in figure 8, a central section A, which is preferably not to be displaced or out of phase, is marked. The end sections Ll, L2, among which the central section A is located, are hanging loosely multiple times at the start of the starting phase. In the first starting step, the first M1 motor with a G sensor is moved to a certain position (for example, the previous end position when it was switched off) as a servo motor. The loosely hanging end sections L1, L2 of the pull cable (indicated by a line of dashes and dots in figure 8) are not yet necessarily pulled.
Another refinement of the starting method of the invention: with the Ml motor, because of its G position encoder, the terminal position occupied at the time of the previous shutdown can be stored, in which the Ml motor was switched off. The next time it starts, it is first moved to this previous end or terminal portion (first stopping criterion). In this way, the first initially loose end section Ll can also be stretched. The other loose end section L2 may remain loose; it is coupled with the second motor M2 (without sensor).
With the traction mechanism shown in figure 8, it is required that the central cable section A is not moved back and forth in a longitudinal direction, and remains tensioned instead. This central section ends in the two loose cable sections Ll and L2. A refinement on the basis of the invention now consists of the following (see also figure 9 with the associated text):
First, a first switching assembly SI according to figure 9 is closed, with the result that the windings W2 of the second motor M2 (without sensor) are bridged. For this purpose, each phase winding is allocated to a switching element of the first switching assembly Sl. Then, only the first Ml motor with G encoder can be controlled. This is then controlled in such a way that the M1 servo motor is moved back to a previously vacated endpoint (first stopping criterion). This causes the loose end section Ll to be pulled. Due to certain circumstances, central section A is not out of step or out of place. The second loose end section L2 first remains loose. In the subsequent step, the first switching set 81 is opened and a second switching set S2 (arranged between said two motors M1, M2) or their switching elements, respectively, are closed. The Ml servo motor is then short-circuited and acts as an electrodynamic brake. This offers the advantage that a Ll end section remains tight or pulled. For the second special motor "M2, position detection in any form is also expedient, whether this is done by means of an extra sensor or software using an injection technique and / or an engine model (so-called sensorless method" ). “The special motor M2, also called a“ slave ”, is then moved, in the appropriate direction according to a position detection, until an increased current flow can be detected by means of a current controller based on a torque of high load (according to stopping criterion). The drive mechanism is then fully operational and the start-up procedure may change to normal operation.
According to figure 9, the drive system comprises a drive motor and a traction motor, where one Ml of the two motors is preferably a standard synchronous motor with a G encoder. The other second motor M2 is a special motor, the winding ends of which are configured on a terminal board, and the windings of which can be short-circuited or bridged via the first switching set (Sl). Also, a second switching set (S2) is present, which makes it possible to short-circuit all the poles of the connection between the two motors. This short circuit21 is preferably implemented through switching elements, which are integrated in the special motor M2, so that in series connection of these two motors (Ml and M2), either the motor Ml or motor M2 can be separately controlled using short circuit switches.
List of Reference Symbols Ml first synchronous motor
M2 second (special) engine without sensor
Traction line bl, b2 Acceleration ψπύ, Vm2 Flow connection of the first or second synchronous motor
Position sensor
Gear wheel
Power converter
W<sub>u</sub>i<sub>;2</sub> Motor torque phase winding
Wvi, 2 motor torque phase winding
W<sub>W</sub>L2 Motor torque phase winding
U, V, W Power converter phase terminals
Control device
Comparison point of speed command value / actual value
Speed controller
Limiter
Current controller usq_ref Quadrature current component usd_ref Direct current component
PWM Pulse width modulator m_ref Motor torque control value isq_ref Quadrature current component command value
<td></td><td> 10</td><td>Current command value controller quadrature</td>
<td></td><td> 11</td><td>Current command value comparator square / actual value</td>
<td> 5</td><td> 12</td><td>Multiplier element</td>
<td></td><td>Ψ</td><td>Magnetic flow connection</td>
<td></td><td> 13</td><td>Add signal limiter</td>
<td></td><td> 7,8</td><td>Engine torque controller</td>
<td></td><td> 14</td><td>Controller traction torque</td>
<td> 10</td><td> 15</td><td>First sum point</td>
<td></td><td> 16</td><td>Signal reversal element</td>
<td></td><td> 17</td><td>Direct current command value controller</td>
<td></td><td> 18</td><td>Current command value comparator continuous / actual value</td>
<td> 15</td><td>isd_ref</td><td>Direct current command value component</td>
<td> —</td><td> 19</td><td>Negative limit -</td>
<td></td><td>bias_torque</td><td>Pre-pull torque</td>
<td></td><td> 20</td><td>Second sum point</td>
<td></td><td>Iql, lq2</td><td>Quadrature current components of the first or</td>
<td> 20</td><td></td><td>second Ml or M2 synchronous motor, respectively</td>
<td></td><td>ídl, Í2</td><td>Direct current component</td>
<td></td><td>V</td><td>Angular displacement</td>
<td></td><td>G</td><td>sensor</td>
<td></td><td>W1, W2</td><td>motor windings</td>
<td> 25</td><td>L1, L2</td><td>pull line end sections 1</td>
<td></td><td>U, V, W</td><td>phases</td>
Contents3
7 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7
18 members in 8 offices
Priority claims8
| Document | Office | Kind | Date |
|---|---|---|---|
| 07117386 | European Patent Office (EPO) | A | |
| 07117386 | European Patent Office (EPO) | A | |
| 102007046681 | Germany | A | |
| 102007046681 | Germany | A | |
| 071173868 | – | – | – |
| 1020070466813 | – | – | – |
| DE20071046681 | – | – | – |
| EP20070117386 | – | – | – |
Members18
| Document | Office | Kind | |
|---|---|---|---|
| CA2639841A1 | Canada | A1 | |
| EP2043251A1 | European Patent Office (EPO) | A1 | |
| JP2009089591A | Japan | A | |
| US2009102402A1 | United States of America | A1 | |
| DE102008042201A1 | Germany | A1 | |
| CN101453189A | China | A | |
| BRPI0803535A2This record | Brazil | A2 | |
| EP2043251B1 | European Patent Office (EPO) | B1 | |
| AT468656T | Austria | T | |
| ATE468656T1 | Austria | T1 | |
| DE502007003870D1 | Germany | D1 | |
| US7944158B2 | United States of America | B2 | |
| CN101453189B | China | B | |
| JP5420218B2 | Japan | B2 | |
| CA2639841C | Canada | C | |
| BRPI0803535B1 | Brazil | B1 | |
| BRPI0803535B8 | Brazil | B8 | |
| DE102008042201B4 | Germany | B4 |
9 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)LapsedEM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2794 DE 23-07-2024 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.B24J | B24J | |
| Lapse acc. art. 78, item iv - on non-payment of the annual fees in timeLapsedREFERENTE A 16A ANUIDADE.B21F | B21F | |
| Correction of notification of the grant [chapter 16.3 patent gazette]REF. RPI 2561 DE 04/02/2020 QUANTO AO TITULO.B16C | B16C | |
| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]GrantedPRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 04/02/2020, OBSERVADAS AS CONDICOES LEGAIS.B16A | B16A | |
| Decision: intention to grant [chapter 9.1 patent gazette]B09A | B09A | |
| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]B06F | B06F | |
| Patent application procedure suspended [chapter 6.1 patent gazette]B06A | B06A | |
| Others concerning applications: alteration of classificationA CLASSIFICACAO ANTERIOR ERA: B62D 5/04B15K | B15K | |
| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]B03A | B03A |
Numbers
- Publication, DOCDB
- PI0803535
- Publication, EPODOC
- BRPI0803535
- Application
- 3535
- Application, DOCDB
- PI0803535
- Application, EPODOC
- BR2008PI03535
Titles2
- Portuguese
- método de controle orientado por campo para um acionamento elétrico e de operação para um acionamento para tracionar um objeto, arranjo de motor elétrico, e, controlador de posição e/ou velocidade para o controle orientado por campo de um acionamento elétrico
- English
- field-oriented control method for an electric drive and operating for a drive to pull an object, electric motor arrangement, and, position and / or speed controller for field-oriented control of an electric drive
Classification
- CPC, 5
- H02P5/747
- H02P21/06
- Y10T74/19
- Y10T74/1967
- Y10T74/1852
- IPC, 1
- B62D5 04